If the box is still responsive, rename the file to G_MS-90.bin (if required by your loader) and update via the menu.
For those looking to recover their from a boot loop, "software error," or a "no signal" issue caused by corrupt firmware, here is the original factory dump file. Download Dump Original Geant HD90 zip
If the box is dead (red light only), use a CH341A or similar SPI programmer to flash the 8MB chip directly. If the box is still responsive, rename the file to G_MS-90
Here is the forum-style post for the firmware dump. Subject: [Download] Geant GN-HD90 Original Firmware Dump (ZIP) Hello everyone, If the box is still responsive
Recovery, SPI Flasher programming, or RS232 restoration. Download Link: [INSERT YOUR DOWNLOAD URL HERE] Installation Note: